public function assignAttribute($input_arr)
 {
     if ($this->isAttributeLabelAlreadyExists($input_arr['attribute_id'], $input_arr['category_id'])) {
         return array('err' => true, 'err_msg' => trans('webshoppack::admin/manageCategory.attributes_already_assigned_msg'));
     }
     $input_arr['date_added'] = \DB::raw('NOW()');
     $cat_attribute_id = ProductCategoryAttributes::insertGetId($input_arr);
     $attribute_id = $input_arr['attribute_id'];
     return array('err' => false, 'err_msg' => '', 'list_row' => $this->getHTMLListRowAssigned($attribute_id, 'assigned', $input_arr['category_id']), 'row_id' => $attribute_id);
 }